Preheat the grill to medium. Arrange the ribs on a large baking sheet and rub on both sides with the oil, then season generously with the spice mixture. Cover the baking sheet tightly with foil and grill, with the cover down, until the meat is tender, about 1 hour.

Remove the foil and place the ribs on the grill. Cook, turning once, until lightly charred, about 10 minutes.